Volkswagen Golf / Golf GTI / Jetta. Manual — part 470

47-26

Note:

Pre-bleeding brake caliper

- Screw piston into housing by

turning knurled wheel clockwise.

Use special tool 3272/1 to help

screw in.

If the piston is pushed back with

a piston resetting tool or by
operating the foot brake the
automatic adjustment in the
brake caliper is destroyed.

- Install brake pads.

Note:

Position brake caliper as illustrated
to pre-bleed.

- Open bleed valve (arrow -A-) and

using a standard bleeder bottle,
with brake fluid until bubble-free
brake fluid flows from the
threaded hole (arrow -B-) (brake
hose connection).

- Close bleed valve.

Rear brake caliper, servicing

47-27

Pressure leak test

Special tools and equipment

Requirements:

Brake system (hydraulic unit, brake
hoses, brake lines and brake
calipers) operating properly and free
of leaks.

VAG 1310 A Brake pressure

gauge

- Remove bleed screw at one of

the front brake calipers. Connect
pressure gauge from VAG 1310A
and bleed.

- Apply pressure to brake pedal

until the gauge indicates a
pressure of 50 bar (725 psi). The
pressure must not drop by more
than 4 bar (58.01 psi) during the
test period of 45 seconds.
Replace master cylinder if
pressure drops greatly.

Rear brake caliper, servicing

47-28

Brake
pressure
regulator,
assembly
overview

1 - Brake

pressure
regulator

Checking

and
adjusting

Page

47-29

2 - Hex

socket
head
screw,
21 Nm
(15 ft.
lb)

3 - Hex

bolt, 16
Nm (12
ft. lb)

4 - Nut, 21

Nm (15
ft. lb)

5 - Spring

6 - Mounting

bracket

Brake pressure regulator, assembly overview

47-29

Brake pressure regulator,
checking and adjusting

Special tools and equipment

VAG 1310 A Brake pressure

gauge

The brake pressure regulator is

mounted on a bracket mounted to
the rear axle. The regulator is
controlled from the rear axle by a
spring.

Checking function

- Depress the brake pedal and

release quickly (vehicle standing
on its wheels).

Brake pressure regulator must

move.

Brake pressure regulator, assembly overview